Note 3 - LOANS/LEASES RECEIVABLE - Loans by Internally Assigned Risk Rating (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Loans and leases	$ 4,361,051	$ 4,243,791
Construction Loans [Member]
Loans and leases	607,798
Internally Assigned Risk Rating [Member]
2021	437,366
2020	1,419,174
2019	722,453
2018	463,811
2017	278,093
Prior	252,512
Revolving Loans Amortized Cost Basis	204,435
Loans and leases	3,777,844
Commercial Portfolio Segment [Member]
Loans and leases	1,784,986	1,726,723
Commercial Portfolio Segment [Member] | C&I - revolving
Loans and leases	168,842
Commercial Portfolio Segment [Member] | C&I - other
Loans and leases	1,616,144
Commercial Portfolio Segment [Member] | Internally Assigned Risk Rating [Member]
Loans and leases		1,555,217
Commercial Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] | C&I - revolving
Revolving Loans Amortized Cost Basis	168,842
Loans and leases	168,842
Commercial Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] | C&I - other
2021	236,175
2020	593,171
2019	262,123
2018	135,603
2017	127,062
Prior	72,666
Loans and leases	1,426,800
Commercial Portfolio Segment [Member] | Pass [Member]
Loans and leases		1,506,578
Commercial Portfolio Segment [Member] | Pass [Member] | C&I - revolving
Revolving Loans Amortized Cost Basis	162,696
Loans and leases	162,696
Commercial Portfolio Segment [Member] | Pass [Member] | C&I - other
2021	235,962
2020	585,345
2019	236,279
2018	135,169
2017	126,353
Prior	65,041
Loans and leases	1,384,149
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans and leases		23,929
Commercial Portfolio Segment [Member] | Special Mention [Member] | C&I - revolving
Revolving Loans Amortized Cost Basis	3,159
Loans and leases	3,159
Commercial Portfolio Segment [Member] | Special Mention [Member] | C&I - other
2021	155
2020	717
2017	542
Prior	1,401
Loans and leases	2,815
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans and leases		24,710
Commercial Portfolio Segment [Member] | Substandard [Member] | C&I - revolving
Revolving Loans Amortized Cost Basis	2,987
Loans and leases	2,987
Commercial Portfolio Segment [Member] | Substandard [Member] | C&I - other
2021	58
2020	7,109
2019	25,844
2018	434
2017	167
Prior	6,224
Loans and leases	39,836
Commercial Real Estate Portfolio Segment [Member]
Loans and leases		2,107,629
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Loans and leases	461,272	496,471
Commercial Real Estate Portfolio Segment [Member] | CRE - non owner occupied
Loans and leases	610,582
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans and leases		541,455
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans and leases		1,069,703
Commercial Real Estate Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] | Owner Occupied Commercial Real Estate Loans [Member]
2021	46,731
2020	177,908
2019	67,363
2018	47,559
2017	35,477
Prior	77,018
Revolving Loans Amortized Cost Basis	9,216
Loans and leases	461,272	496,471
Commercial Real Estate Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] | CRE - non owner occupied
2021	40,813
2020	189,731
2019	121,013
2018	91,985
2017	84,329
Prior	72,421
Revolving Loans Amortized Cost Basis	10,290
Loans and leases	610,582
Commercial Real Estate Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans and leases		1,069,703
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Commercial Real Estate Loans [Member]
2021	45,903
2020	176,851
2019	66,254
2018	46,025
2017	32,743
Prior	75,721
Revolving Loans Amortized Cost Basis	9,216
Loans and leases	452,713	488,478
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | CRE - non owner occupied
2021	36,894
2020	180,112
2019	98,515
2018	76,057
2017	79,124
Prior	64,414
Revolving Loans Amortized Cost Basis	8,625
Loans and leases	543,741
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans and leases		999,931
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Commercial Real Estate Loans [Member]
2021	604
2020	57
2019	180
2018	264
2017	676
Prior	1,297
Loans and leases	3,078	3,087
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | CRE - non owner occupied
2021	3,481
2020	8,825
2019	3,265
2018	15,424
2017	4,242
Prior	7,307
Revolving Loans Amortized Cost Basis	997
Loans and leases	43,541
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans and leases		43,785
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Commercial Real Estate Loans [Member]
2021	224
2020	1,000
2019	929
2018	1,270
2017	2,058
Loans and leases	5,481	4,906
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | CRE - non owner occupied
2021	438
2020	794
2019	19,233
2018	504
2017	963
Prior	700
Revolving Loans Amortized Cost Basis	668
Loans and leases	23,300
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans and leases		25,987
Construction and Land Development [Member] | Construction Loans [Member]
Loans and leases	607,798
Construction and Land Development [Member] | Internally Assigned Risk Rating [Member] | Construction Loans [Member]
2021	53,842
2020	207,167
2019	184,506
2018	125,398
2017	12,765
Prior	3,141
Revolving Loans Amortized Cost Basis	9,960
Loans and leases	596,779	541,455
Construction and Land Development [Member] | Pass [Member] | Construction Loans [Member]
2021	53,842
2020	207,167
2019	174,028
2018	124,718
2017	12,765
Prior	3,141
Revolving Loans Amortized Cost Basis	9,960
Loans and leases	585,621	530,297
Construction and Land Development [Member] | Special Mention [Member] | Construction Loans [Member]
2018	680
Loans and leases	680	680
Construction and Land Development [Member] | Substandard [Member] | Construction Loans [Member]
2019	10,478
Loans and leases	10,478	10,478
Multi-family
Loans and leases	396,272
Multi-family | Internally Assigned Risk Rating [Member]
2021	49,494
2020	213,302
2019	64,817
2018	47,232
2017	7,496
Prior	13,666
Revolving Loans Amortized Cost Basis	265
Loans and leases	396,272
Multi-family | Pass [Member]
2021	49,494
2020	213,302
2019	64,817
2018	47,082
2017	7,496
Prior	13,666
Revolving Loans Amortized Cost Basis	265
Loans and leases	396,122
Multi-family | Substandard [Member]
2018	150
Loans and leases	150
1-4 family real estate
Loans and leases	368,927
1-4 family real estate | Internally Assigned Risk Rating [Member]
2021	10,311
2020	37,895
2019	22,631
2018	16,034
2017	10,964
Prior	13,600
Revolving Loans Amortized Cost Basis	5,862
Loans and leases	117,297
1-4 family real estate | Pass [Member]
2021	10,273
2020	37,895
2019	22,631
2018	15,897
2017	8,273
Prior	13,523
Revolving Loans Amortized Cost Basis	5,862
Loans and leases	114,354
1-4 family real estate | Special Mention [Member]
2021	38
2017	154
Prior	1
Loans and leases	193
1-4 family real estate | Substandard [Member]
2018	137
2017	2,537
Prior	76
Loans and leases	$ 2,750
Commercial and Commercial Real Estate Portfolio Segments [Member] | Internally Assigned Risk Rating [Member]
Loans and leases		$ 3,662,846
As a % of Total		100.00%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Pass [Member]
Loans and leases		$ 3,525,284
As a % of Total		96.25%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Special Mention [Member]
Loans and leases		$ 71,481
As a % of Total		1.95%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Substandard [Member]
Loans and leases		$ 66,081
As a % of Total		1.80%